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Tavorite

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Formula:
LiFe3+(PO4)(OH)
System:
Triclinic
Colour:
Grass-green, yellow-green
Lustre:
Sub-Vitreous, Resinous, Waxy, Greasy
Hardness:
5
Name:
Named in 1954 by Marie Louise Lindberg (Smith) and William T. pecora in honor of Elysairio Tavora [b. 1911 Brasil], professor of mineralogy, Universidad de Brasil Rio de Janeiro, Brasil.
Isostructural with:

Classification of Tavorite

Valid - first described prior to 1959 (pre-IMA) - "Grandfathered"
8.BB.05

8 : PHOSPHATES, ARSENATES, VANADATES
B : Phosphates, etc., with additional anions, without H2O
B : With only medium-sized cations, (OH, etc.):RO4 about 1:1
41.5.9.1

41 : ANHYDROUS PHOSPHATES, ETC.CONTAINING HYDROXYL OR HALOGEN
5 : (AB)2(XO4)Zq
19.1.14

19 : Phosphates
1 : Phosphates of the alkali metals
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First Recorded Occurrence of Tavorite

General Appearance of First Recorded Material:
Bright lime green scales and fine-grained masses
Year of Discovery:
1955
Geological Setting of First Recorded Material:
Late stage phosphate mineralization in a granite pegmatite
Associated Minerals at First Recorded Locality:

Physical Properties of Tavorite

Sub-Vitreous, Resinous, Waxy, Greasy
Diaphaneity (Transparency):
Transparent, Translucent
Colour:
Grass-green, yellow-green
Streak:
Pale yellow green
Hardness (Mohs):
5
Tenacity:
Brittle
Cleavage:
Perfect
Perfect on {100}, good on {110}, distinct on {011}, and on {001}, imperfect.
Fracture:
Micaceous
Density:
3.32 g/cm3 (Measured)    3.33 g/cm3 (Calculated)

Crystallography of Tavorite

Crystal System:
Triclinic
Class (H-M):
1 - Pinacoidal
Space Group:
P1
Cell Parameters:
a = 5.340Å, b = 7.283Å, c = 5.110Å
α = 109.29°, β = 97.86°, γ = 106.32°
Ratio:
a:b:c = 0.733 : 1 : 0.702
Z:
2
Morphology:
Bladed crystals, often rounded and/or etched. Found as fine-grained masses to sever mm
X-Ray Powder Diffraction Data:
d-spacingIntensity
4.99 (50)
4.68 (30)
3.95 (20)
3.285 (90)
3.045 (100)
2.474 (40)
1.662 (3b)

Optical Data of Tavorite

Type:
Biaxial (+)
RI values:
nα = 1.795 nβ = 1.811 nγ = 1.861
2V:
Measured: 74° , Calculated: 78°
Birefringence:
0.066
Max Birefringence:
δ = 0.066
Image shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:
Very High
Dispersion:
r << v
Optical Extinction:
Y^b ~ 0°, Z^c ~38°, X^a ~ 15°
Pleochroism:
Strong
Comments:
X = Y = yellow-green, Z = colorless

Chemical Properties of Tavorite

Formula:
LiFe3+(PO4)(OH)
Essential elements:
All elements listed in formula:

Relationship of Tavorite to other Species

Other Members of Group:
8.BB.05AmblygoniteLiAl(PO4)F
8.BB.05MontebrasiteLiAl(PO4)(OH)
8.BB.10Triplite(Mn2+,Fe2+)2(PO4)(F,OH)
8.BB.10Zwieselite(Fe2+,Mn2+)2(PO4)F
8.BB.15SarkiniteMn22+(AsO4)(OH)
8.BB.15Triploidite(Mn2+,Fe2+)2(PO4)(OH)
8.BB.15Wagnerite(Mg,Fe2+)2(PO4)F
8.BB.15Wolfeite(Fe2+,Mn2+)2(PO4)(OH)
8.BB.15Stanĕkite(Mn2+,Fe2+,Mg)Fe3+(PO4)O
8.BB.15JoosteiteMn2+(Mn3+,Fe3+)(PO4)O
8.BB.15HydroxylwagneriteMg2(PO4)(OH)
8.BB.20HoltedahliteMg2(PO4)(OH)
8.BB.20Satterlyite(Fe2+,Mg,Fe3+)2(PO4)(OH,O)
8.BB.25AlthausiteMg4(PO4)2(OH,O)(F,☐)
8.BB.30AdamiteZn2(AsO4)(OH)
8.BB.30EveiteMn22+(AsO4)(OH)
8.BB.30LibetheniteCu2(PO4)(OH)
8.BB.30OliveniteCu2(AsO4)(OH)
8.BB.30ZincolibetheniteCuZn(PO4)(OH)
8.BB.30ZincoliveniteCuZn(AsO4)(OH)
8.BB.30AuriacusiteFe3+Cu2+(AsO4)O
8.BB.35ParadamiteZn2(AsO4)(OH)
8.BB.35TarbuttiteZn2(PO4)(OH)
8.BB.40BarbosaliteFe2+Fe23+(PO4)2(OH)2
8.BB.40HentscheliteCuFe23+(PO4)2(OH)2
8.BB.40Lazulite(Mg,Fe2+)Al2(PO4)2(OH)2
8.BB.40ScorzaliteFe2+Al2(PO4)2(OH)2
8.BB.40WilhelmkleiniteZnFe23+(AsO4)2(OH)2
8.BB.45TrolleiteAl4(PO4)3(OH)3
8.BB.50NamibiteCu(BiO)2(VO4)(OH)
8.BB.55PhosphoellenbergeriteMg14(PO4)6(HPO4,CO3)2(OH)6
8.BB.60UrusoviteCuAl(AsO4)O
8.BB.65TheoparacelsiteCu3(As2O7)(OH)2
8.BB.70TuraniteCu5(VO4)2(OH)4
8.BB.75StoiberiteCu5(VO4)2O2
8.BB.80FingeriteCu11(VO4)6O2
8.BB.85AverieviteCu6(VO4)2O2Cl2
8.BB.90LipscombiteFe2+Fe23+(PO4)2(OH)2
8.BB.90RichelliteCaFe23+(PO4)2(OH,F)2
8.BB.90ZinclipscombiteZnFe23+(PO4)2(OH)2
19.1.1LithiophosphateLi3PO4
19.1.2OlympiteNa5Li(PO4)2
19.1.3NahpoiteNa2HPO4
19.1.4DorfmaniteNa2HPO4 · 2H2O
19.1.5NalipoiteNaLi2PO4
19.1.6StercoriteNa(NH4)HPO4 · 4H2O
19.1.7Archerite(K,NH4)(H2PO4)
19.1.8Biphosphammite(NH4,K)(H2PO4)
19.1.9Phosphammite(NH4)2(HPO4)
19.1.10LithiophiliteLiMn2+PO4
19.1.11SickleriteLi1-x(Mnx3+Mn2+1-x)PO4
19.1.12FerrisickleriteLi1-x(Fex3+Fe2+1-x)PO4
19.1.13TriphyliteLiFe2+PO4
19.1.15MarićiteNaFe2+(PO4)

Other Names for Tavorite

Name in Other Languages:
German:Tavorit
Spanish:Tavorita

Other Information

Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for Tavorite

Reference List:
Science (1954), 119, 739
Lindberg, M. L. and Pecora, W. T. (1955) Tavorite and barbosalite, two new phosphate minerals from Minas Gerais, Brazil. American Mineralogist: 40: 952-966.
American Mineralogist: 1977): 62: 559.
Soviet Physics – Crystallography: 29: 27-30.

Internet Links for Tavorite

Localities for Tavorite

map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the symbol to view information about a locality. The symbol next to localities in the list can be used to jump to that position on the map.
(TL) indicates type locality for a valid mineral species. (FRL) indicates first recorded locality for everything else. ? indicates mineral may be doubtful at this locality. All other localities listed without reference should be considered as uncertain and unproven until references can be found.
Brazil
 
  • Minas Gerais
    • Doce valley
      • Conselheiro Pena
Canadian Mlneralogist Vol. 20, pp. 87-89 (1982)
Sergio Varvello
Baijot, M., Hatert, F., Dal Rio, F. & Philipo, S. (2014) Mineralogy and petrography of phosphate mineral association from the Jocão pegmatite, Minas Gerais, Brazil. Canadian Mineralogist 52, 373-397.
      • Galiléia
        • Laranjeiras
[MinRec 12:69]
        • Sapucaia do Norte
AmMin 89:1087
Science (1954): 119: 739; Lindberg, M.L. and Pecora, W.T. (1955) Tavorite and barbosalite, two new phosphate minerals from Minas Gerais, Brazil. American Mineralogist 40, 952-966.
  • Paraíba
    • Borborema mineral province
      • Pedra Lavrada
Am Min (1955) 40:55-63
R. Wegner, H. Pöllmann, T. Witzke, & W. Schuckmann (1998): Colquiriite, carlhintzeite, ralstonite and pachnolite from Serra Branca-Pegmatite/Brazil.- Proceedings 17th General Meeting, IMA, August 1998, Toronto, A151
Germany
 
  • Bavaria
    • Upper Palatinate
      • Waidhaus
        • Hagendorf
http://www.berthold-weber.de/h_miner.htm
Madagascar
 
  • Fianarantsoa Province
    • Amoron'i Mania Region
      • Ampandramaika-Malakialina Pegmatite Field
        • Ambatofinandrahana District
Behier, J. (1960): Contribution á la mineralogie de Madagascar. Annales Géologiques de Madagascar XXIX, Tananarive, p 63-64
Morocco
 
  • Marrakech-Tensift-El Haouz Region
    • El Kelaâ des Sraghna Province
      • Sidi Bou Othmane
Favreau, G. (2012): Deux pegmatites à phosphates de Sidi Bou Othmane (Maroc). Le Cahier des Micromonteurs, 3-2012, 71-109
  • Souss-Massa-Draâ Region
    • Ouarzazate Province
      • Tazenakht
FRANSOLET, A.-M. (1974) Les phosphates lithiques des pegmatites de la plaine des Zenaga (Anti-Atlas, Maroc). Notes Serv. géol. Maroc, 35, 137-143
Namibia
 
  • Erongo Region
    • Karibib District
      • Okatjimukuju Farm 55 (Friedrichsfelde Farm)
P. Keller and O. von Knorring, Eur. J. Mineral. , 1989, 1, pp. 567-593.
      • Okongava Ost Farm 72
Collection of Barry Murphy, Micromount specimen catalogue number 00896
      • Tsaobismund Farm 85
Contrib Mineral Petrol (1986) 92:502-517
      • Usakos
Von Bezing, L., Bode, R., and Jahn, S., (2008) Namibia Minerals and Localities. Edition Schloss Freudenstein, Bode Verlag GmbH, Haltern. 409 (in English).
Keller (1974)
Portugal
 
  • Viseu District
    • Mangualde
Mineralien Atlas
    • Sátão
      • Ferreira de Aves
        • Aldeia Nova
Romania
 
  • Sibiu Co.
    • Lotru-Cibin Mts
Androne, D.A.M., Buzgar, N., and Kasper, H.U. (2005): Proceedings of the Annual Scientific Session of The Geological Society of Romania, Rosia Montana, 20-21 May 2005, 16-26.
Rwanda
 
  • Western Province
    • Gatumba District
Bertossa, A., 1967. Inventaire des minéraux du Rwanda. Bulletin du Service Géologique de Rwanda 4, 25-45.; Daltry, V.D.C. and O. von Knorring (1998) Type-Mineralogy of Rwanda with Particular Reference to the Buranga Pegmatite. Geologica Belgica 1:1-9
South Africa
 
  • Northern Cape Province
    • ZF Mgcawu District
      • Kenhardt
Minerals of South Africa
Spain
 
  • Castile and Leon
    • Zamora
      • Villar del Buey
        • Pinilla de Fermoselle
USA
 
  • New Hampshire
    • Grafton Co.
      • Groton
Rocks & Minerals (2005) 80:242-261 New Hampshire Mineral Locality Index
Mineralogical Record (1973) 4:103-130
  • South Dakota
    • Custer Co.
      • Custer District
        • Custer
Rocks & Min.:60:117.; Am Min (1969), 54:969-972
R&M 75:3 pp 156-169
R&M 75:3 pp 156-169
        • Fourmile
Rocks & Minerals: 60: 117.
        • Pringle
          • Cicero Peak
Rocks & Minerals: 75(3): 156-169.
      • Needles
R&M 75:3 pp 156-169
    • Pennington Co.
      • Keystone District
Handbook of Mineralogy - Anthony, Bideaux, Bladh, Nichols
        • Keystone
Rocks & Minerals: 67(6): 380-388.
Mineral and/or Locality  
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